Surface soil removal

An experiment was conducted to study the effect of surface soil removal and organic amendment on soil properties cultivating sesame (Sesamum indicum L.) during Kharif 2018. A split plot with three replications was designed. Surface soil removal of 0 (control), 5 and 10 cm designated as D0, D1 and D2 were carried out, respectively. The addition of different organic amendments was adopted vis, O0- control, O1- vermicompost @ 3 tonnes ha-1 , O2- poultry litter @ 3 tonnes ha-1 and O3- pig manure @ 3 tonnes ha-1 .

8p chauchaungayxua10 18-03-2021 11 2   Download

Weeding is one of the major control operations in the vegetable crops. The traditional method of weed control is to remove the weed manually by a Khurpi or Spade. This is a very time consuming process. Due to shortage of agricultural labour in peak season, farmers cannot compete weeding in time. Mechanical weeding keeps the soil surface loose, which results in better aeration and moisture conservation. In our country the average land is about 0.

8p trinhthamhodang1218 26-02-2021 11 1   Download

Conservation agriculture (CA) is based on principles of minimum soil disturbance through zero or minimum tillage operations, residue retention on soil surface and crop diversification which not only improves healthy functioning of soil but also enhances nutrient availability, its biological quality and aggregate formation. On the other hand, conventional tillage (CT) practices characterized by excessive tillage, residue removal and monoculture are often associated with the degradation of soil mainly in terms of depletion of Soil Organi arbon (SOC), sub-soil compaction and loss of biodiversity.

8p angicungduoc5 14-06-2020 10 1   Download

In the present-day agriculture, weed regulator in the farm lands is a tedious process that needs more money and human effort. There are a number of methods such as manually removing the unwanted plants by using traditional hand tools or by spraying chemical weedicides which will kill the weeds or using some mechanical equipment’s. Of the above-mentioned methods, the mechanical weeding is mostly preferred due to its low operating cost and human effort.

11p cleopatrahuynh 01-06-2020 6 0   Download

A weed is essentially any plant which grows where it is not required. A weed can be thought of as any plant growing in the wrong place at the wrong time and doing more harm than good. Weeds are the most severe and widespread biological constraint to crop production, and cause invisible damage till the crop is harvested. The composition and competition by weeds are dynamic and dependent on soil, climate, cropping and management factors. Weeds decrease the value of land, particularly perennial weeds, which tend to accumulate on long fallows; increase cost of cleaning.

9p quenchua2 15-12-2019 20 0   Download

A batch type ginger washing-cum-peeling machine was developed and investigated for its use in the production line of bleached dry ginger. The machine used 2 hard nylon brush rollers that rotated at 200 rpm in opposite direction. The rhizomes got lifted and tumbled on the rollers, and the application of jets of water removed the soil and other foreign material from the surface of rhizomes and about 59% of the total peels. Output capacity of the machine was 13.86 kg/h with about 2% loss of edible material.

16p cothumenhmong1 08-12-2019 16 0   Download

Surface mining activities in past and recent times have resulted in the existence of a number of overburden dumps (mine spoils) through excavation and deposition of removed soil and rock debris. These spoils require environmental stabilization through proper revegetation.

13p danhdanh11 09-01-2019 20 1   Download

Drainage of water through the soil profile to groundwater and surface water appears to be the hydrologic pathway that most frequently leads to problematic nitrate contamination of surface waters in agricultural watersheds. This can occur in two ways: by natural drainage where ground water contributes to stream flow and river flow, and by artificial subsurface drainage, where perforated pipes (sometimes called tile drains) have been buried in the soil for the purpose of removing water to reduce damage caused by saturated conditions and thereby enhance crop production (Fig. 1).

27p tainhacmienphi 19-02-2013 62 4   Download

Decreases in pH and ANC are often paral- leled by changes in element concentrations including increases in Al +3 concentrations and decreases in Ca +2 . High dissolved Al +3 concen- trations can have toxic effects on many types of aquatic biota, and at extreme levels few aquatic species can survive (Table 1). Organic forms of Al +3 are much less toxic than inorganic forms. Emerging research suggests that Ca +2 concentra- tions in streamwater are also an important bio- logical indicator.

9p doipassword 01-02-2013 50 3   Download

This book is for anyone interested in the consequences of disturbance. What happens after the lava cools, or when the muddy floodwaters recede or an old road is abandoned? Primary succession is the process of ecosystem development on barren surfaces where severe disturbances have removed most vestiges of biological activity. It includes the development of complex systems from simple biotic and abiotic (non-biological) components. Primary succession starts when plants, animals and microbes colonize new surfaces. The process is influenced by local conditions, context and site history.

458p phoebe75 01-02-2013 68 5   Download

Sorption is a process by which chemicals or organisms become attached to soils and/or the geologic rock material (aquifer solids) and removed from the water. Often the sorption process is reversible and solutes desorb and hence dissolved-solute plumes are retarded, rather than solutes being permanently retained by the solids. Cation exchange is the interchange between cations in solution and cations on the surfaces of clay particles or organic colloids. Filtration is a process that affects particulate contaminants (e.g.

93p cao_can 29-12-2012 49 7   Download

Embankment crest and the toe: that is limited to the scope of protection of the embankment on the shore. Roof slope: expressed as the ratio, for example 1:3. Roof more comfortable (less steep), the embankment as a protective effect, but the price will be more expensive (for large embankment surface). Structure and size of the overlay: Overlay roof design must be capable of against the effects of currents, waves, etc. Conventional coatings include removable components assembled together. Gap between them so that water inside to escape, to avoid the effects of water pressure in the soil....

38p thachthaoxanh 23-08-2011 45 4   Download