A. Winogradsky & R. Morphy
B. Winogradsky & Dokuchaev
C. Bennett & Dokuchaev
D. both A & B
Submitted by: Mir Mehrbiyar
Correct Answer: Bennett & Dokuchaev ✔
Last Updated: January 02, 2021
Related MCQs
- Which of the following crops is most tolerant to salty soils?
- Soil pores created by the animal such as earthworm and plant root are called_________?
- Aridisols cover the largest in Pakistan_______?
- The soils in which the weathered material is taken away to other place by several agents are called__________?
- International Union of Soil Sciences (IUSS), founded in__________?
- Nitrosomonas and nitrobacter are together as called__________?
- Which of the following soil has the highest water holding capacity_________?
- Element responsible pollen grain of plant__________?
- Specific heat of organic matter is______?
- What is a soil horizon?
- Accumulation of soluble salts in soil________?
- The largest soil order in Pakistan?
- The marble is a__________?
- Which type of soil is found near the canal banks:
- A and B horizon is called as_________?
- Who consider the various properties of soil in relation to plant production?
- The process by which nutrients chemicals or contaminants are dissolved and carried away by water, or are moved into a lower layer of soil:
- Available water is held between?
- Which of the following is not a metamorphic rock?
- Which nutrients are immobile in plants?
- Which element is found highest in earth crust?
- Specific heat is higher in:
- BGA was discovered as a nitrogen fixer in paddy field by ?
- Decomposition of the organic matter in submerged soil is carried out by?
- Which element is known as chemical police man of plant?
- 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.