A. Magnesium
B. Phosphorus
C. Potassium
D. All of the above
Submitted by: Shafiq Rehman
Correct Answer: Potassium ✔
Last Updated: November 05, 2020
Related MCQs
- Which of the following nutrient elements are regarded as energy exchangers:
- A mineral horizon that is either too thin, too light in colour, too low in organic matter:
- Soil Organic Matter (SOM) which consists of about _______ % organic carbon plays a vital role by providing macro & micro nutrients:
- Each layer of phyllosilicates is composed of two types of sheets:
- The internal & external surfaces of soil colloids are positively and or negatively charged. Mostly __________ is dominant:
- Which of the following is not the soil order prevail in Pakistan?
- Which of the following is wrong?
- The availability of essential nutrients from soil to the plants is controlled by the ________ properties of soil:
- Conservation agriculture improves the water use efficiency of dryland systems. It has components:
- The planned development, distribution and use water resources:
- Water is the major constituent of all living creatures. Biomass of plants is composed of ________% water:
- Based on their diameters, soil pores are divided into:_________?
- Depending on the percentage of sand, silt, clay, soils are divided into _______ textural classes:
- __________ particles range in diameter between 0.02 to 0.002 mm:
- Systematic examination of soil in the field and laboratories, their description and grouping according to classification system:
- swelling clay soils, develop cracks due to greater proportion of swelling type clays:
- There are twelve soil orders found in the world of which six soil orders have been recognized at various locations are________?
- _________is probably the most important growth limiting factor in acid soils especially those having pH below 5.0-5.5?
- The removal of excess water from the ground surface is called:________?
- What is the effect of application of P2O5 fertilizer to a green manure leguminous crop in the availability of phosphorus to the succeeding crop?
- Ground water refers to the________?
- The percentage of calcium content in single superphosphate?
- 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__________?