A. 24%
B. 25%
C. 19.5%
D. 30%
Submitted by: Shafiq Rehman
Correct Answer: 19.5% ✔
Last Updated: November 05, 2020
Related MCQs
- The tension of the water at the upper plastic limit is equivalent to pF value:
- Clay and humus particles are referred to as colloids and are less than 0.002mm. Due to their small size, colloids have __________ surface area which provides surface for adsorption, catalysis, precipitation and microbial colonization:
- Soil samples are collected:
- _________ erosion is the removal of a thin layer of soil by water acting over the whole surface. This type of erosion damaged very fertile lands located on slopes, some of which have been eroded to a depth of about 15 cm.
- In Pakistan there is general deficiency of rainfall. It varies from 125 mm annually in upper Sindh to about 900 mm in the sub-mountainous of northern Pakistan. In Balochistan the mean annual rainfall is about 200 mm, diminishing to ________ mm in the desert of Kharan:
- Losses of soil water not includes_________?
- The relative abundance of three types of rocks ( igneous-metamorphic- sedimentary) in the earth’s crust is_________?
- Oxygen and Silicon together comprise approximately ______ %of the earth crust?
- Potassium (K) occurs as a constituent of the earth’s crust in the proportion of_________?
- In Pakistan, Nitrophos is manufactured in_________?
- All the SSP and some nitrophos are are manufactured locally by the National Fertilizer Corporation (NFC): SSP at_________?
- In Pakistan, the major phosphatic fertilizers are:
- Soil Organic Matter (SOM) serves not only as a reservoir of all the required plant nutrients, but it:
- Humus generally refers to the decomposed organic residues which have undergone a series of degradation and synthesis cycles. The humic substances consist of a series of highly acidic, yellow to black coloured, high molecular weight compounds __________, which can be separated using different extraction procedures:
- Which of the following is a component of nucleic acid and protein:
- Rhizoplane is________?
- Which chemical used to prevent evaporation from surface of water in water bodies?
- Composition of igneous rock is determined by__________?
- Who will decompose organic matter first:
- Process of mixing of soils is known as_________?
- Walkley and Blacks method of organic matter determination allows recovery of _____% organic carbon content:
- The soil samples are dried at __________, for gravimetric soil analysis?
- The appropriate method to apply phosphatic fertilizers is__________?
- Integrated Nutrient Management (INM) is a well-accepted approach for the sustainable management of________?
- Organic (O) horizon is absent in_________?
- Association of two microorganisms in which one is benefited while other remains unaffected is known as:________?
- What is Vesicular Arbuscular Mycorrhiza (VAM)?
- The very high temperatures required for ICP-AES are attained by__________?
- Exposure of the manures to rains causes highest loss of__________?
- In cotton, zn deficiency is known as_________?
- 1 mg of H+ will be equal to_________?
- The unique soil environment under the influence of plants roots is called rhizosphere and this term was given by__________?
- The credit for identifying the essentality of K, Ca, Mg and P to planta goes to________?
- Rate of entry of water in soil is__________?
- Which leaf of rice is sampled for tissue nutrient analysis?
- During decomposition of organic matter, inititial decomposition is dominated by:__________?
- The instrument used for measuring the photosynthetically active radiations (PAR) is:________?
- The credit for identifying the essentality of nitrogen to plants goes to________?
- What kind of nitrogenous (N) fertilizers should not be used for flooded soil:
- 1 meq of HCl is equal to_________?
- Organisms satisfying their carbon requirement as Co2 from atmosphere and energy requirement from oxidation of simple inorganic compound are called as_________?
- Loss of nitrogen in the form of NH3 in alkaline medium is known as_________?
- Browning disease of rice is a_________?
- If a manure pile is exposed to the rain, what nutrient will be lost the most ?
- What is the optimum temperature and pH for nitrifying bacteria ?
- The first mechanism to start in the wind erosion is_________?
- The indicator used for estimation of the soil available boron is_______?
- Source of negative charges on silicate clays is/ are________?
- Soil order characterized by excess of weathering with dominant iron and aluminium oxide clays, common in tropics is_________?
- 1 bar is equal to_________?
- Select the water soluble phosphatic fertilizer from the following__________?