Consider the following agricultural practices : 1. Contour bunding

(i) Excessive use of fertilisers changes the chemistry of soil and kills useful microbes. (ii) Excessive use of non-biodegradable chemical pesticides leads to biological magnification. (iii) Extensive cropping causes loss of soil...

Some harmful effects of agricultural practices on environment are:  (i) Excessive use of fertilisers changes the chemistry of soil and kills useful microbes.  (ii) Excessive use of non-biodegradable chemical pesticides leads to...

(d) All are soil conservation methods.

(a) Organic farming is a production system of crops which avoids the use of synthetic and chemical inputs like fertilizers, pesticides, growth regulators and livestock feed additives.

(d) Contour Bunding is one of the simple method of soil and water conservation. This technique is used at places where the land is sloppy. Due to slope, soil and...

(d) The National Development Council (NDC) in its 53rd meeting held on 29th May, 2007 adopted a resolution to launch a Food Security Mission consisting of rice, wheat and pulses...

(d) Crop rotation, Sand fences, terracing and wind breaks all are used for sand conservation in India. Sand fences is a simple and cheap method of inducing accretion of sands...

(c) 1, 3 and 4